[PATCH] Allow compiling 32-bit JDK on 64-bit host

[Dr Andrew John Hughes]

On 15:28 Wed 30 Mar     , Mladen Turk wrote:
> Hi,
> 
> Attached is the patch that allows compiling
> linux-i586 build on a 64-bit host.
> 
> It doesn't solve the problem entirely since
> setarch util is still needed to run gmake.
> (eg. `setarch i586 gmake ...' )
> 
> The patch makes sure -m32/-m64 flags are always added
> depending on the ARCH_DATA_MODEL like it's done
> when compiling hotspot (or linux-sparc)
> 
> 
> 
> Regards
> -- 
> ^TM

How are you compiling IcedTea?  There is already support for running
linux32 when compiling on x86, and it may just need extending beyond the
zero case.

In the patch, the x86 changes seem obvious, but why are you changing sparc?

> diff -r ba66ade54c26 make/common/Defs-linux.gmk
> --- a/make/common/Defs-linux.gmk	Tue Mar 29 17:18:14 2011 -0700
> +++ b/make/common/Defs-linux.gmk	Wed Mar 30 13:56:28 2011 +0200
> @@ -103,12 +103,12 @@
>  #    This should be the default on X86, but ia64 and amd64 may not have this
>  #    as the default.
>  CFLAGS_REQUIRED_amd64   += -fno-omit-frame-pointer -D_LITTLE_ENDIAN
> -CFLAGS_REQUIRED_i586    += -fno-omit-frame-pointer -D_LITTLE_ENDIAN
> +CFLAGS_REQUIRED_i586    += -march=i586 -fno-omit-frame-pointer -D_LITTLE_ENDIAN
>  CFLAGS_REQUIRED_ia64    += -fno-omit-frame-pointer -D_LITTLE_ENDIAN
> -CFLAGS_REQUIRED_sparcv9 += -m64 -mcpu=v9
> -LDFLAGS_COMMON_sparcv9  += -m64 -mcpu=v9
> -CFLAGS_REQUIRED_sparc   += -m32 -mcpu=v9
> -LDFLAGS_COMMON_sparc    += -m32 -mcpu=v9
> +CFLAGS_REQUIRED_sparcv9 += -mcpu=v9
> +LDFLAGS_COMMON_sparcv9  += -mcpu=v9
> +CFLAGS_REQUIRED_sparc   += -mcpu=v9
> +LDFLAGS_COMMON_sparc    += -mcpu=v9
>  ifeq ($(ZERO_BUILD), true)
>    CFLAGS_REQUIRED       =  $(ZERO_ARCHFLAG)
>    ifeq ($(ZERO_ENDIANNESS), little)
> @@ -116,8 +116,13 @@
>    endif
>    LDFLAGS_COMMON        += $(ZERO_ARCHFLAG)
>  else
> -  CFLAGS_REQUIRED       =  $(CFLAGS_REQUIRED_$(ARCH))
> -  LDFLAGS_COMMON        += $(LDFLAGS_COMMON_$(ARCH))
> +  ifeq ($(ARCH_DATA_MODEL), 64)
> +    CFLAGS_REQUIRED       =  -m64 $(CFLAGS_REQUIRED_$(ARCH))
> +    LDFLAGS_COMMON        += -m64 $(LDFLAGS_COMMON_$(ARCH))
> +  else
> +    CFLAGS_REQUIRED       =  -m32 $(CFLAGS_REQUIRED_$(ARCH))
> +    LDFLAGS_COMMON        += -m32 $(LDFLAGS_COMMON_$(ARCH))
> +  endif
>  endif
>  
>  # Add in platform specific optimizations for all opt levels


-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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